WIP: add Electron platform configuration to Capacitor

- Add electron platform section to capacitor.config.json
- Configure deep linking with timesafari:// scheme
- Set up build options for macOS, Windows, and Linux
- Configure output directory and file inclusion
- Add platform-specific build targets (DMG, NSIS, AppImage)
- Support both x64 and arm64 architectures for macOS
- Set appropriate app categories for each platform

This enables building TimeSafari as a native desktop application
using Capacitor's Electron platform while maintaining existing
mobile and web functionality.

src/services/platforms/CapacitorPlatformService.ts

@@ -244,13 +244,15 @@ export class CapacitorPlatformService implements PlatformService {
    * @returns Platform capabilities object
    */
   getCapabilities(): PlatformCapabilities {
+    const platform = Capacitor.getPlatform();
+    
     return {
       hasFileSystem: true,
       hasCamera: true,
-      isMobile: true,
-      isIOS: Capacitor.getPlatform() === "ios",
-      hasFileDownload: false,
-      needsFileHandlingInstructions: true,
+      isMobile: true, // Capacitor is always mobile
+      isIOS: platform === "ios",
+      hasFileDownload: false, // Mobile platforms need sharing
+      needsFileHandlingInstructions: true, // Mobile needs instructions
       isNativeApp: true,
     };
   }